My 1998 Mustang runs great when the weather is cooler. When it warms up a little, say 60 degrees or so, that's when the problems start. I live 15 miles from town, no problem gatting in there. Then the engine turns over, once, then just quits, like the key was turned off. Let it sit for an hour or so, starts right up and runs great.
Anyone had this problem? Thanks for any info.

I'm sure it is electrical, but the problem is it only happens when the weather turns to 65 degrees or more. I drove it into town, was in the store about 15 minutes, started the engine, just for a minute, then it shut off as though I had turned off the key. Waited an hour or so, started right up, went about ten miles toward home, then did it all over again. Once more I waited awhile, started right up and went the rest of the way home.
There are no indications before this happens. No warning of any kind. Just shuts off.
And never happens when the weather is colder. I drove it all winter, no problem